/*****************************************************************************
*  Copyright 2005 Alt-N Technologies, Ltd.
*
*  Licensed under the Apache License, Version 2.0 (the "License");
*  you may not use this file except in compliance with the License.
*  You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
*  This code incorporates intellectual property owned by Yahoo! and licensed
*  pursuant to the Yahoo! DomainKeys Patent License Agreement.
*
*  Unless required by applicable law or agreed to in writing, software
*  distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*  limitations under the License.
*
*  Changes done by ¢feh@fehcom.de obeying the above license
*
*****************************************************************************/
#ifndef DKIMBASE_H
#define DKIMBASE_H

#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>

#define BUFFER_ALLOC_INCREMENT 256

#include <list>
#include <string>

using namespace std;

class CDKIMBase {
public:
  CDKIMBase();
  ~CDKIMBase();

  int Init(void);

  int Process(const char *szBuffer, int nBufLength, bool bEOF);
  int ProcessFinal(void);

  int Alloc(char *& szBuffer, int nRequiredSize);
  int ReAlloc(char *& szBuffer, int& nBufferLength, int nRequiredSize);
  void Free(char *szBuffer);

  static void RemoveSWSP(char *szBuffer);
  static void RemoveSWSP(char *pBuffer, int& nBufLength);
  static void RemoveSWSP(string& sBuffer);

  static void CompressSWSP(char *pBuffer, int& nBufLength);
  static void CompressSWSP(string& sBuffer);

  static string RelaxHeader(const string& sHeader);

  virtual int ProcessHeaders(void);
  virtual int ProcessBody(char *szBuffer, int nBufLength, bool bEOF);

protected:
  char *m_From;
  char *m_Sender;
  char *m_hTag;
  int m_hTagSize;
  int m_hTagPos;
  char *m_Line;
  int m_LineSize;
  int m_LinePos;
  bool m_InHeaders;

  list<string> HeaderList;
};


#endif  // DKIMBASE_H